Automatic scale



June 4, 1940. N. E. DORRINGTON ET AL 2,202,947

AUTOMATIC scALla Filed April 7, 1938- 2 Sheets-Sheet 1 gwuawwns /V6 Barring/an Geo/ye A. Cu//a/77 @m 9 June 1940. N. E. DORRINGTON El AL 2,202,947

AUTOMATIC SCALE Filed April 7. 1938 2 Sheets-Sheet 2 Gearge ,4. 6U//0//7 Patented June 4, 1940 2,202,947

UNITED STATES PATENT OFFICE AUTOMATIC SCALE Neill E. Dorrington, Oswego, and George A. Cullom, New York, N. Y., assignors to St. Regis Paper Company, New York, N. Y., a corporation of New York Application April 7, 1938, Serial No. 200,698

1 Claim. 249-15) This application relates to improvements in arm 26 from the position in which it is shown automatic weighing apparatus. in Fig. 1 opens the dribble feed gate. Another The object of the invention is to improve autoarm 29 operated by the mechanism within the matic weighing devices, and more particularly control box is connected by a link 30 and suitable those of the dribble feed t pe, lever and link connections, indicated collectively 5 Details and minor objects of the invention will as 3|, to the gate H at the bottom of the weighappear as the description proceeds. ing receptacle. It will be seen that by means of In the accompanying drawings forming a part the three arms 2|, 26 and 29 the gates of the of thi specification, hopper and of the weighing receptacle are con- Fig. 1 is a side elevation of apparatus emtrolled. l0 bodying the invention, parts being broken away; One of the important features of the invention Fig. 2 is a partial side view of th feeding is the arrangement by which the flow of material hopper; to the dribble feed gate is controlled. As will Fig. 3 is a longitudinal section of the feeding clearly app from Fig. 4, there is an inverted hopper; V-shaped guard 35 positioned over the dribble 15 Fig. 4 is a cross-section of the hopper. gate. The sides of this guard are provided with In the embodiment of the invention shown in p n s. In t f illustrat d, t ese op the drawings, there is a stationary hopper I6 are shaped as 510128 36, but they might be formed which feeds material into a weighing receptacle otherwise in any suitable way to constitute a or can II which is pivoted upon a beam l2 and is screen. The purp of this ran e ent is to 20 counterbalanced by a weight l3. The hopp r i insure the feeding of relatively fine material to provided with two main discharge gates l4 and the dribble feed e 80 that the flow to and I5 and with a dribble-feed gate IS, The weighthrough the gate will not be disturbed or caused ing receptacle is provided with a bottom disto be irregular because of relatively coarse :5 charge gate l'l. particles. Also, the guard insures a substantially The operation of the gates is controlled by constant head of material over the dribble feed mechanism which it is not necessary to describe te- The result of this uniformly fi terial in detail and which is enclosed for the most part and Constant head is a uniform and P d le in a gear box l8. The mechanical details of this ow Of material through the dribble d at arrangement form no part of the present inven- It will be readily seen that the guard rests upon 30 tion and, therefore, is disclosed only insofar as is pp Walls 37 d is removable at j ts necessary to show its relation to the subject mat- This arrangeme is particularly es le Where ter of the present invention, different kinds of materials are to be weighed by One way in which the necessary mechanism t e S apparatus s0 that the guard o the 35 may be arranged is obvious in view of the patent dribble feed can be changed when desired to suit 35 to Dorrington on Methods of and apparatus for the nature of the material being wei h d. t weighing out charges, issued November 22, 1938, will be seen that a difierently Shaped guard, such No. 2,137,334. as indicated at dotted lines 39, may be provided, A link 19 connects the scale beam with a trip if d e t in ly s r ive f one 40 arm 20 which initiates operation of the mechapossible change in the contour of the u r 40 nism within the control box. Operated by this It will be seen that the disclosed device immechanism there is an arm 21 connected by a p s the accuracy and speed of the Weighing link 22 with a lever 23 mounted upon the pivot per i n h particular features of h pof gate I5 and connected to swing that gate. A per n ure n ppr a ly ons nt head of link 24 connects the other end of lever 23 with evenly flowing material for the dribble feed, not 45 an arm 25 attached to gate l4 so that when arm materially affected by lumps in the material or 2i is swung to the right, as viewed in Fig. 1, the by varying amounts in the hopper. gates l4 and i5 are swung to their inner or dotted While one form of the improvements has been line position, thereby opening the gates for disdisclosed in considerable detail, and that is a 5 charge of material from the hopper into the form which has been found to work satisfactorily, weighing receptacle. Another arm 26 controlled and is the best form of which we are at present by the mechanism within the control box is conaware, it will be readily recognized that various nected by a link 21 to a lever 28 pivoted upon the modifications may be made within the scope of hopper and carrying dribble gate l6 at its lower the appended claim without departing from the end. It will be readily seen that movement of broad scope of the invention. 55

dribble feed outlet, the guard having screen openings in its sides and admitting screened material to the dribble feed outlet and directing coarser material to the main outlets.

NEIL-L E. DORRHWGTON. GEORGE A. CULLOM. 

